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SAN JOAQUIN <br />,2 <br />C O U N T Y <br />Greatness grows here. <br />September 23, 2021 <br />Don Chesney, PE <br />Chesney Consulting <br />P.O. Box 3794 <br />Turlock, CA 95381 <br />RE: Soil Suitability/Nitrate Loading Study <br />17454 Von Sosten Rd., Tracy <br />APN: 209-460-10, SR0084240 <br />Environmental Health Department <br />Jasjit Kang, REHS, Director <br />Muniappa Naidu, REHS, Assistant Director <br />PROGRAM COORDINATORS <br />Robert McClellon, REHS <br />Jeff Carruesco, REHS, RDI <br />Willy Ng, REHS <br />Melissa Nissim, REHS <br />Steven Shih. REHS <br />The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br />Loading (SSNL) Study, dated September 17, 2021 and has the following comments for your consideration. <br />The SSNL Study was prepared to determine the suitability of the above noted parcel for onsite wastewater <br />treatment system (OWTS) usage and the potential long-term impact of nitrate to groundwater from the <br />proposed accessory dwelling unit (ADLI). <br />Based on the information provided, the EHD can make the following findings: <br />1. EHD will require an oversized 2,000 -gallon septic tank for installation of a standard Onsite Wastewater <br />Treatment System. <br />2. Percolation test conducted on August 23, 2019 yielded a percolation rate of 50 minutes/inch. At this <br />rate, a five-foot soil separation shall be required between bottom of dispersal field and groundwater <br />pursuant to San Joaquin County Onsite Wastewater Treatment Standard table 1.10.2. Per the San <br />Joaquin County Water Resource Lines of Equal Depth to Ground Water Map of Fall 2015, groundwater <br />on site is reported between 30 and 40 feet below surface grade. <br />3. The OWTS and its 100% replacement areas shall meet all required minimum setbacks stated in San <br />Joaquin County (OWTS) Standard and Well Standard. <br />If you have any questions please contact Michael Suszycki, Senior Registered Environmental Health <br />Specialist, at msuszycki@sjgov.org or (209) 598-7001. <br />Steven hih, REHS <br />Program Coordinator <br />c: Lakhbir Singh Sahota, 17454 Von Sosten Rd., Tracy, CA. 95304 <br />1868 E. Hazelton Avenue I Stockton, California 95205 1 T 209 468-3420 1 F 209 464-0138 1 www.sjgov.org/ehd <br />